Joseph Kapler Posted December 29, 2021 Share Posted December 29, 2021 Any thoughts on taxonomy of this tooth? It was collected from a horizon in the Hell Creek Formation, Powder River County, Montana that was said to contain Nanotyrannus remains. 1 Link to comment Share on other sites More sharing options...
dingo2 Posted December 30, 2021 Share Posted December 30, 2021 Definitely looks like nano 1 Link to comment Share on other sites More sharing options...
FB003 Posted December 30, 2021 Share Posted December 30, 2021 I agree. Looks like a nano tooth. Nice pinch at the base. 1 *Frank* Link to comment Share on other sites More sharing options...
Guns Posted December 30, 2021 Share Posted December 30, 2021 Real nice Nanotyrannus tooth btw great photography . Guns Link to comment Share on other sites More sharing options...
Troodon Posted December 30, 2021 Share Posted December 30, 2021 Beautiful tooth I'm going to go against convention here and say it's a Trex tooth. Yes, it has the lingual and labial depressions, but the base is not rectangular. In addition, other characteristics favor Trex including a contiguous carina wrapping around the tip as one instead of two distinct carinae as in Nanotyrannus. In addition, the CBR (Crown Base Ratio) of 1.64 is more typical of Trex than Nanotyrannus. Trex teeth the mean is typically under 2 (Smith 2005). My study on Nanotyrannus showed a mean over 2. 2 Link to comment Share on other sites More sharing options...
ThePhysicist Posted December 30, 2021 Share Posted December 30, 2021 (edited) 10 hours ago, Troodon said: In addition, other characteristics favor Trex including a contiguous carina wrapping around the tip as one instead of two distinct carinae as in Nanotyrannus. I believe I've asked this before, but isn't a contiguous carina typical in unworn Tyrannosaurs - including Nano? I have a Tyrannosaur that's clearly of the Nano-morph but has serrations crossing the apex. Edited December 30, 2021 by ThePhysicist 1 "Argumentation cannot suffice for the discovery of new work, since the subtlety of Nature is greater many times than the subtlety of argument." - Carl Sagan "I was born not knowing and have had only a little time to change that here and there." - Richard Feynman Collections: Hell Creek Microsite | Hell Creek/Lance | Dinosaurs | Sharks | Squamates | Post Oak Creek | North Sulphur River | Lee Creek | Aguja | Permian | Devonian | Triassic | Harding Sandstone Instagram: @thephysicist_tff Link to comment Share on other sites More sharing options...
Troodon Posted December 30, 2021 Share Posted December 30, 2021 Nothing is published on Nanotyrannus so hard to adequately address that characteristics. My observation is based on the teeth in my collection that there are two distinct carina and the tips are pointed not blunt. A smooth contiguous carinae is typical of Trex teeth. It would not change my ID of the tooth in question. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now